<!DOCTYPE html>
<html lang="en">

<frameset cols="25%,50%,25%">
  <frame src="/Day01/examplexample/a.html">
  <frame src="/Day01/examplexample/b.html">
  <frame src="/Day01/examplexample/c.html">
</frameset>
<head>
    <meta charset="UTF-8">
    <title>垂直框架</title>
</head>
<body>
</body>
</html>